When is the cold dew solar term of 202 1?

It is the seventeenth of the twenty-four solar terms, which indicates the coming of late autumn. "Twenty-four solar terms" said: "In September, the dew is cold and will condense." Cold dew means that the temperature is lower than that of the white dew, and the dew on the ground is colder and will soon condense into frost. In the cold dew season, Nanling and the vast area to the north have entered autumn, the northeast has entered late autumn, and the northwest has entered winter or is about to enter winter.

There are three types of cold dew:

Waiting for Hongyan guests. Egrets and geese have started to fly south, and this is the last batch. The ancients called the latecomers "guests".

Second, sparrows become clams when they enter the water. In the cold late autumn, all the birds disappeared. The ancients saw a large number of clams suddenly appearing on the seashore, and the stripes and colors of shells were very similar to those of birds, so they thought they were birds, so there was this saying.

Three chrysanthemums have yellow flowers. "Flower" means "flower". All the plants and trees bloom because of the sun, and the unique chrysanthemum blooms because of the shade, and its color is just in the late autumn when the soil is flourishing.